Combined combustion chamber used for piston engine

Abstract

The invention discloses a combined combustion chamber used for a piston engine. The combined combustion chamber comprises an air cylinder head, an auxiliary combustion chamber formed in the air cylinder head, and a main combustion chamber formed among the air cylinder head, the auxiliary combustion chamber and a piston. The auxiliary combustion chamber communicates with the main combustion chamberthrough multiple first channels arranged at the bottom of the auxiliary combustion chamber, and the center lines of the first channels are arranged in a bias manner in the radial direction relative to the center line of the auxiliary combustion chamber. High-strength vortexes are forcefully formed and maintained in the auxiliary combustion chamber so that the combustion speed of the engine can beobviously increased, the highest explosion pressure is controlled, the fuel economy is improved, and the requirement for high safety of the aircraft engine is met.

Description

technical field [0001] The present application relates to the field of piston engine combustion chambers, specifically but not exclusively, to a multi-channel combined combustion chamber for two-stroke aviation heavy oil piston engines. Background technique [0002] In recent years, two-stroke aviation heavy oil piston engines have played an increasingly important role in small aircraft and unmanned aerial vehicles. Among them, the reasonable organization and good combustion of the airflow in the combustion chamber of the heavy fuel oil piston engine will directly affect the performance and working efficiency of the heavy fuel oil engine. Therefore, the optimization of the shape of the combustion chamber will greatly promote the development of the heavy fuel oil engine. . [0003] The heavy oil engine combustion chambers involved in the prior art can be divided into open type, semi-open type, vortex type and pre-combustion type combustion chambers according to the different...

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Problems solved by technology

Among them, although the traditional open and semi-open combustion chambers can achieve better performance in the application of four-stroke engines, it is difficult to meet the requirements due to the insufficient injection pressure, injection velocity and injection penetration of the used injectors. High-speed combustion requirements of two-stroke engines; although the vortex combustion chamber can generate vortex in advance, but without pre-combustion, the combustion speed can not keep up with the development of high-speed two-stroke engines; the existing traditional pre-combustion combustion chamber, in There is only one channel between the auxiliary combustion chamber and the main combustion chamber, resulting in large throttling loss, and cannot generate high-intensity swirl, resulting in high fuel consumption and poor economy

[0004] It can be seen that the above-mentioned existing combustion chambers cannot well adapt to the high-speed combustion requirements of the two-stroke heavy oil engine, nor can it control the maximum explosion pressure of the engine combustion well, resulting in thickening of the engine block structure and reducing the power of the engine. Ratio, it is difficult to meet the safety requirements of aero-engines

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